Hardwick, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.6 °F (low) to 55 °F (high). Annual precipitation averages 30.1 Inches. Hardwick is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.0 °F | 23.6 °F | 0.8 in. |
| February | 9.9 °F | 28.4 °F | 0.95 in. |
| March | 21.5 °F | 40.8 °F | 1.48 in. |
| April | 33.4 °F | 55.7 °F | 2.85 in. |
| May | 46.3 °F | 68.1 °F | 3.96 in. |
| June | 57.7 °F | 78.2 °F | 4.71 in. |
| July | 61.3 °F | 82.3 °F | 3.52 in. |
| August | 58.5 °F | 79.9 °F | 3.42 in. |
| September | 49.7 °F | 73.3 °F | 3.33 in. |
| October | 36.4 °F | 59.1 °F | 2.5 in. |
| November | 23.2 °F | 42.2 °F | 1.35 in. |
| December | 11.8 °F | 28.3 °F | 1.22 in. |
| Annual | 34.6 °F | 55 °F | 30.09 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |